Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
(64+128)=256*(r2)/(r2+(1/(1/1000+1/r1))); (128-64)=256*(r2)/(r2+(1/(1/1000000+1/r1)))
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random